I bought loads of books about science for my god daughter and didn't find women were under represented - you can imagine, being me, I looked them over carefully before buying them.
this seems to be starting from the premise that a woman must have a child. It could easily have been "I want to be a ..."
I don't know enough about the children's book market, maybe it is a huge step forward but if it is, and if children's books still mostly show male doctors and plumbers, that's a pity.
There is a personal element for me in that woman = mother is the most problematic of stereotypes (I'd argue not just for me actually) but then again that's a problem at the core of the feminism.
sorry that's all a bit heavy for Monday morning and I'm looking after mum today so if the discussion gets longer and I'm not back, please bear with me, I'll be back eventually..!